Featuring a durable hard shell, smooth 360°dual wheels and secured TSA-approved locks, our luggage trolley set is easy to carry or manoeuvre around airports, train stations or any transport hub where getting there on time is as important as arriving with peace of mind. Super lightweight and yet strong and sturdy, the Wanderlite Trolley Set comprises 28" and 20" sizes of which the latter can be kept in the former. Aluminium pull rod, corner guard protectors and top and side handles add to the effortless handling of each luggage.Why TSA-approved locks?The USA Transport Security Administration (TSA) recommends that all visitors to North America to use luggages installed with TSA-approved locks to facilitate closer inspection of luggages when necessary. The TSA has a master key to open these locks. If other locks are used, they may be destroyed in order to gain access.